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/*-------------------------------------------------------------------------
*
* gistdesc.c
* rmgr descriptor routines for access/gist/gistxlog.c
*
* Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/backend/access/rmgrdesc/gistdesc.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/gist_private.h"
#include "lib/stringinfo.h"
#include "storage/relfilenode.h"
static void
out_target(StringInfo buf, RelFileNode node)
{
appendStringInfo(buf, "rel %u/%u/%u",
node.spcNode, node.dbNode, node.relNode);
}
static void
out_gistxlogPageUpdate(StringInfo buf, gistxlogPageUpdate *xlrec)
{
out_target(buf, xlrec->node);
appendStringInfo(buf, "; block number %u", xlrec->blkno);
}
static void
out_gistxlogPageSplit(StringInfo buf, gistxlogPageSplit *xlrec)
{
appendStringInfo(buf, "page_split: ");
out_target(buf, xlrec->node);
appendStringInfo(buf, "; block number %u splits to %d pages",
xlrec->origblkno, xlrec->npage);
}
void
gist_desc(StringInfo buf, uint8 xl_info, char *rec)
{
uint8 info = xl_info & ~XLR_INFO_MASK;
switch (info)
{
case XLOG_GIST_PAGE_UPDATE:
appendStringInfo(buf, "page_update: ");
out_gistxlogPageUpdate(buf, (gistxlogPageUpdate *) rec);
break;
case XLOG_GIST_PAGE_SPLIT:
out_gistxlogPageSplit(buf, (gistxlogPageSplit *) rec);
break;
case XLOG_GIST_CREATE_INDEX:
appendStringInfo(buf, "create_index: rel %u/%u/%u",
((RelFileNode *) rec)->spcNode,
((RelFileNode *) rec)->dbNode,
((RelFileNode *) rec)->relNode);
break;
default:
appendStringInfo(buf, "unknown gist op code %u", info);
break;
}
}
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